66043101 has 4 divisors (see below), whose sum is σ = 88057472. Its totient is φ = 44028732.

The previous prime is 66043091. The next prime is 66043111. The reversal of 66043101 is 10134066.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (66043091) and next prime (66043111).

It is not a de Polignac number, because 66043101 - 2¹⁷ = 65912029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66043111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11007181 + ... + 11007186.

It is an arithmetic number, because the mean of its divisors is an integer number (22014368).

Almost surely, 2^66043101 is an apocalyptic number.

It is an amenable number.

66043101 is a deficient number, since it is larger than the sum of its proper divisors (22014371).

66043101 is a wasteful number, since it uses less digits than its factorization.

66043101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22014370.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 66043101 is about 8126.6906548730. The cubic root of 66043101 is about 404.2119533671.

Adding to 66043101 its reverse (10134066), we get a palindrome (76177167).

The spelling of 66043101 in words is "sixty-six million, forty-three thousand, one hundred one".